Humidifier



FIG. 1 is a perspective view of a humidifier showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view (right side being a mirror image) thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a bottom plan view thereof.

The broken line showing of a fragmentary electrical cord in FIGS. 2, 4, 5, and 6 of the drawing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a humidifier, as shown and described. 